ATI Super Damper LS Harmonic Balancer

The crank damper has to match your accessory spacing the same way the rest of the drive does. These are ATI Super Dampers for Gen III and IV LS engines in the two spacings our accessory drives run: Fbody (98-02 Camaro/Firebird style) and Corvette (C5/C6 style).

Pick the AC belt option to match the build. The with-AC versions carry the rear AC belt drive, which is what you want with our Sanden AC accessory drive or any setup keeping belt-driven AC. The no-AC versions leave it off.

Stock diameter keeps accessory speeds and belt lengths factory. The 10% underdrive versions spin the accessories about ten percent slower and take a shorter belt than stock, so plan your belt when you order one. ATI builds the Fbody underdrive pair with 40 durometer rubber and doesn't intend them for full race engines.

All of these are SFI 18.1 certified, internally balanced elastomer dampers with laser engraved 360 degree timing marks. They press on, and ATI calls for their damper installation tool for the job. Mounting hardware comes with the stock diameter no-AC versions; the rest don't include it.

Part numbers by option:

• Fbody stock diameter: 917302 (no AC), 917264 (with AC)
• Fbody 10% underdrive: 917277 (no AC), 917276 (with AC)
• Corvette stock diameter: 917303 (no AC), 917266 (with AC)
• Corvette 10% underdrive: 917279 (no AC), 917278 (with AC)